Antislipping attachment for horseshoes.



W. G. ROBERTSON, J11. ANTISLIPPING ATTACHMENT FOR HORSESHOES.

APPLICATION FILED JUNE 11, 1912.

1,064,090, Patented June 10, 1913.

cnLUMBlA PLANOORAPH c0.. WASHINGTON, 0. c.

WILLIAM G. ROBERTSON, JR., OF WASHINGTON, DISTRICT OF COLUMBIA.

ANTISLIPPING ATTACHMENT FOR IIORSESHOES.

Specification of Letters Patent.

Application filed June 11, 1912.

Patented J une 10, 191 3.

Serial No. 702,981.

T 0 all LO/1.07M it may concern Be it known that I, TVVILLTAMI G.Ronnn'rson, Jr, a citizen of the United States, residing at Washington,in the District ol. Cohunbia, have invented certain new and usefulImprovements in Antislipping Attachments for Horseshoes, of which thefollowing is a specification.

The object of my invention is to provide an anti-slipping attachment forhorscshoes of simple, cheap and practical construction, designedespecially for icy road beds and which may be carried by the drivers ofthe teams and be quickly applied when needed, without the services of ablacksmith.

It relates to that form of anti-slipping attachment in which two barscarrying calks on their outer faces are crossed upon each other andpivotally connected together and are provided with means for connectingthem with the horseshoe, and my invent-ion consists in the specialconstruction and arrangement for locking the bars in attached positionand for holding them to the upper inner edge of the horseshoe ashereinafter more fully described with reference to the drawing.

Figure 1 is a top plan view of the upper side of a horseshoe next to thehorses hoof, showing my anti-slipping attachment applied one of thebolts and its reinforcing backing 7 being in section; Fig. 2 is a bottomplan View of the same parts, showing the face next to the ground; Fig. 3is a, transverse section, taken on line 3--3 of Fig. 1; Fig. 4; is aninside View of one of the cross bars; Fig. 5 shows details of one of theholding bolts and the key by which it is turned; Fig. 6 is a detail of amodified form of the locking means for the middle of the cross bars; andFig. 7 is a detail of a modified form of the holding bolt.

In the drawing, A represents a horseshoe and B, B are two crossed barspivotally connected to each other at or near the middle by a bolt E. Thecrossed bars B, B have each near each of its ends two holes, the outerone of which is countersunk and receives a headed calk D whose head liesun derneath the horseshoe, as seen in Fig. The other adjacent hole isscrew threaded and is adapted to receive a screw bolt C whose concentrichead lies normally above the plane of the shoe and engages its inner andupper edge. The head of the bolt is convex on the upper side so as togive a sharp tapering edge all around that readily enters the spacebetween the horses hoof and the shoe on the inner edge 01 the same inall rotary positions of the bolt. Integrally upon each cross baradjacent its bolt hole there is formed a reinforced backing 1" to holdthe head of the bolt safely and firmly over on top oil. the inner edgesof the shoe in the slight space between the shoe and the horses boot.The middle portion of the bolt C is screw threaded and is turned intothe screw threads ot' the cross bar, but where the bolt protrudes below,it is squared, as seen in Fig. 5, to receive a square socket key K bywhich the bolt may be turned up or down from its lower end. There isalso formed on each cross bar around each of its bolt holes a downwardlyprojecting guard 7) of circular form. These are cast or forgedintegrally on the bars and are set away from the holes far enough toreceive the end of the key K the wall of whose socket lies between theguard 11 and the squared end of the bolt. This guard protects the lowerend of the bolt from wear and prevents the hammering action on stones inthe road bed from riveting the lower end of the bolt fast which wouldprevent it from being turned and would deform it so that it would notenter the socket ot' the turning key. By means of the bolt U as thusdescribed it will be seen that the head of said boll: may be drawn downto any thickness of shoe, whether it be a new one, or worn thin, andthus be made to pinch and hold any attachment on regardless of thecondition of wear on the shoe. It will be understood that thereinforcing backing r for the bolt will be of less elevation than theminimum thickness of the shoe.

For adjusting the attachment to the shoe, and adapting it also to shoesof different size, the middle portion of each cross bar is formed with adisk shaped enlargement of considerably greater diameter than the crosssection of the bar and these enlargements are formed with a concentriccircle of raised teeth or corrugations Z, which corrugations are all adefinite and uniform dis tance from the center oil the clamping bolt 1*and which are designed to give a. different angular position to thecross bars in relation to each other and to lock them together to anyadjustment. Thus, when the bars it, B" are turned about the centerclamping bolt ll) to bring the holding bolts C up against the inneredges of the shoe with their heads overlapping the top side of the shoeas in Fig. 3, then the nut F is tightened on the bolt E which brings thecorrugations Z of one bar into mesh and locking engagement with thesimilar corrugations on the other bar. This, it will be seen, rigidlylocks together the two bars in this fixed angular relation to hold myattachment to the shoe. To look the clamping nut F against turning onthe bolt and the acci dental loosening of the bars, any suitable locknut may be employed, as for example, a simple pin 6 may be driventhrough any one of a series of radial holes in the nut and through aregistering transverse hole in the bolt, said pin having its endclenched as shown.

To apply the attachement to a shoe, the bars B, B being loose at theirpivot bolt, are collapsed sufficiently to let the bolt heads 0 go insideof the shoe. The bars are then expanded to bring the shanks of bolts 0against the inner edges of the shoe, as seen in Fig. 3. The bars B, Bare then locked in this position through the agency of the cen terclamping bolt and the corrugations, and then the key K is applied to thelower outer ends a of the holding bolts C and the latter being turnedare by their screw threads drawn down individually to a tight bearing ofeach head upon the upper inside edge of the shoe to make a very secureattachment which is not liable to loosen and come off. As a furthersafeguard, however, the cross bars B, B may be extended out beyond theedges of the shoe and formed with an upturned flange 7 as seen in dottedlines in Fig. 3, to which flanges may be applied straps s to pass overthe horses hoof. I make no claim to such flanges and straps, as I amaware that they are old and well known.

It will be understood that in applying my attachment, it isself-adjusting to its position inside of the shoe, finding its ownplace, and this also adapts it to shoes of different width and sizes.While this is true within certain limits, I propose to make myattachments in different sizes to provide for the great difference insizes and shape from a mules shoe to that of a Percheron horse.

In order to give a fine adjustment for the bars B, B in bringing theirholding bolts C against the inner edges of the horseshoe, thecorrugations Z are set a considerable distance from the center andconsequently the middle of each cross bar is considerably enlarged withthe corrugations at the outer periphery of the enlargements andconcentric to the bolt hole, but I do not confinemyself to corrugationsalone as any concentric interlocking means may be employed. Thus, forinstance, the enlarged middle portions of the bars may have a concentricseries of circular holes as seen at 71, in Fig. 6 adapted to receive apin or screw. Instead of the holding bolt C, I may also employ anunthreaded bolt C as in Fig. 7, having longitudinal slots in differentpositions along its length, each adapted to receive a tapering key 0which will draw down the head of the bolt to suit the thickness of theshoe, such flat key to have its small end bent to prevent withdrawal.

In calling attention to the concentrically headed bolt 0 and its mode ofadjustment, I would state that no matter what position of rotaryadjustment the bolt is in, the head always has an over-lap above theshoe in all thicknesses of shoe, even if half worn out, and the headgets its bearing against the shoe for any infinitesimal turn of thebolt, as the head projects on all sides of the shank of the bolt and therotary turning of the bolt does not lose its grip on the upper edge ofthe shoe, and, furthermore, the lower end of the bolt, to which the keyis applied, is of smaller cross section than the hole in the bar so thatthe bolt is insertible into the bar from the upper side.

I claim:

1. An attachment for horseshoes comprising two pivoted bars with meansfor look ing them in different angular positions, said bars having holesthrough their outer ends, bolts arranged in said holes and formed withheads on their upper ends projecting in all directions around theirshanks and insertible into the bar from the upper side and adapted tohave the heads overlap and engage the shoe in all rotary adjustments,each of said bolts having adjusting means for adjusting its head down toshoes of varying thickness and the head being formed with a sharptapering edge all around to enter the space between the horseshoe andhoot.

2. An attachment for horseshoes comprising two pivoted bars with meansfor locking them in diii'erent angular positions, said bars havinginteriorly screw threaded holes, bolts in said holes, each having a headon its upper end projecting in all directions around the shank andhaving a screw threaded middle portion and a smaller lower end ofangular cross section to receive the socket of a turning tool and thehead of the bolt being formed with a sharp tapering edge all around toenter the space between the horseshoe and hoof.

3. An attachment for horseshoes comprising a supporting frame bearingcalks and made in two connected bars adjustable in relation to eachother, means for locking them to their adjustment and holding means forconnecting the bars to the shoe comprising bolts with concentric headsat their upper ends arranged in the outer ends of the bars and formedwith tapering edges, said bolts having adjusting means at their lowerends for drawing down their heads to varying thicknesses of shoes.

4. An anti-slipping attachment for horseshoes comprising bars bearingcalks With holes beside them, concentrically headed holding boltsinsertilole through the holes in the bars from the upper side and screwthreaded into the bars and provided with means for turning them fromtheir lower ends, said bars being formed with d0wn- Wardly projectingguards around the lower ends of the bolts and also a reinforced backingfor the bolts on the upper side of the bars made of less height than theminimum thickness of shoe.

In testimony whereof I allix my signature in presence of two witnesses.

WILLIAM G. ROBERTSON, JR. \Vitnesses:

11:. J. NEALE,

DAVID VOL'F.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

